TABC agents began their investigation early Saturday just hours after the crash.

“We’re establishing where they had been and if they were sold alcohol while they were drunk,” said TABC spokeswoman Carolyn Beck.

Beck said that agents will interview patrons, servers, bartenders and any other witnesses who were in the club. In addition, agents will gather receipts and also obtain any video from surveillance cameras at the club.

“The investigation could take days or it could take months,” Beck said.